CN202741687U - Package type sand core positioning structure - Google Patents
Package type sand core positioning structure Download PDFInfo
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- CN202741687U CN202741687U CN 201220414084 CN201220414084U CN202741687U CN 202741687 U CN202741687 U CN 202741687U CN 201220414084 CN201220414084 CN 201220414084 CN 201220414084 U CN201220414084 U CN 201220414084U CN 202741687 U CN202741687 U CN 202741687U
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- core
- main core
- sand core
- fitting portion
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Abstract
The utility model discloses a package type sand core positioning structure, and aims to provide the package type sand core positioning structure which is reliable and stable in sand core positioning, is high in production efficiency, enables castings with complex cavity interior structures to be achieved easily, and can effectively improve the product percent of pass of castings. The package type sand core positioning structure comprises a primary sand core and at least one secondary sand core, the primary sand core is provided with product molding portions and embedding portions, the secondary sand core is provided with a product molding portion and an embedding portion, the primary sand core is composed of a first primary sand core and a second primary sand core, and the first primary sand core and the second primary sand core are respectively provided with a product molding portion and an embedding portion. The first primary sand core and the second primary sand core are respectively provided with a splitting surface, the splitting surface of the first primary sand core is attached to the splitting surface of the second primary sand core, and the splitting surfaces of the first primary sand core and the second primary sand core are provided with limiting grooves used for containing the embedding portion of the secondary sand core. The embedding portion of the secondary sand core is positioned in the limiting grooves, and the primary sand core is positioned on a mold through the embedding portions of the primary sand core.
Description
Technical field
The utility model relates to a kind of sand core for casting, is specifically related to a kind of coated sand core positioning structure.
Background technology
In sand casting process, core is the vitals that forms the foundry goods die cavity.Core generally includes the formed product section that forms product section, and is arranged on core one end for the fitting portion that cooperates with mould; Core generally is positioned on the mould by fitting portion.The internal structure of some foundry goods die cavities is very complicated, so that the difficulty of the core mold design of making core is very large, even can't realize.As shown in Figure 3, primary cavity 18 inside of this foundry goods 17 also are embedded with embedded die cavity 19, and the outlet of embedded die cavity 19 is positioned at primary cavity 18.As shown in Figure 6, this foundry goods 17 in core manufacturing process, the main core 1 corresponding with primary cavity and be difficult to by the moulding of traditional core preparation method integral production with sub-core 2 corresponding to embedded die cavity.Internal structure for this class foundry goods die cavity is very complicated, when core is difficult to the integral production moulding, usually adopts at present following two kinds of methods to solve:
One is made solid processing with baroque part in casting process, namely in the core design process with the core excision of the inner labyrinth of corresponding die cavity; After the spray moulding, obtain again the die cavity of solid processing section by methods such as machined, welding.For example, sub-core 2 Partial Resections with corresponding with embedded die cavity 19 in Fig. 3 medium casting 17 stay the main core 1 corresponding with primary cavity; The core making is just easy like this, and main core can directly be positioned on the mould by fitting portion.The method major defect is: one, solid processing section easily produce the defectives such as shrink in casting process; Its two, simultaneously casting material increases, and raises the cost; Its three, cause the amount of machining of foundry goods to increase, reduce production efficiency.
Its two, the cavity structure of complexity is decomposed, namely the sand core structure of complexity decomposed, core is split into two or more fairly simple cores; Then select directly to be positioned at core on the mould as main core, and at main core locating hole is set; Other cores are as sub-core, and the fitting portion of sub-core is designed to latch; Then the fitting portion with sub-core inserts on the locating hole of main core, thereby obtains complete core.For example, as shown in Figure 5, split with main core 1 corresponding with primary cavity 18 in the foundry goods 17 of Fig. 3 with sub-core 2 corresponding to embedded die cavity 19; Then at main core 1 locating hole 20 is set, the fitting portion 6 of sub-core 2 is arranged to latch, and the latch of sub-core 2 is inserted in main core 1 locating hole.The shortcoming of the method is: because the core rough surface, and sand core strength is not good; The group core inserts in the process of main core, because latch and locating hole rough surface can produce larger friction between latch and the locating hole; Simultaneously because sand core strength is not good, thereby easily makes on latch and the locating hole surface and the drop phenomenon occurs, the generation gap; Make between sub-core and the main core and easily become flexible, cause between sub-core and the main core and produce deviations, dislocation, cause casting section thickness uneven, even the defectives such as shrink, cut occur; The disqualification rate of foundry goods improves greatly.
The utility model content
The purpose of this utility model is in order to overcome the at present very complicated foundry goods of this class die cavity internal structure, because core is difficult to one-body molded making, causes the production cost of foundry goods to improve, and production efficiency reduces; And easily produce deviations, dislocation between the core that splits, so that the high problem of the disqualification rate of foundry goods; Provide a kind of core location reliable, stable, production efficiency is high, is easy to realize the foundry goods of die cavity internal structure complexity, but and the coated sand core positioning structure of Effective Raise cast product qualification rate.
The technical solution of the utility model is:
A kind of coated sand core positioning structure comprises main core and at least one sub-core, all has formed product section and fitting portion on described main core and the sub-core; Described main core is made of the first main core and the second main core, and all has formed product section and fitting portion on the first main core and the second main core; Have fractionation face on the first main core and the second main core, and the fractionation face of the first main core and the second main core fits; The fractionation face of the described first main core and the second main core is provided with the stopper slot for accommodating sub-core fitting portion, and the fitting portion of described sub-core is positioned in the stopper slot; Described main core is positioned on the mould by its fitting portion.The first main core and the second main core are to be split by main core, thereby have fractionation face on the first main core and the second main core, and the fractionation face of the first main core and the second main core fits.
As preferably, stopper slot is extended and runs through fractionation face toward formed product section by the fitting portion of main core; Have at least a part to be clamped between the fitting portion of the first main core and the second main core in the described sub-core fitting portion.Owing to having at least a part to be clamped between the fitting portion of the first main core and the second main core in the sub-core fitting portion, behind the mould matched moulds, clamping force that can upper and lower mould is retained as one reliably with the fitting portion of sub-core, the first main core and the second main core, guarantees the stability of sub-core and the first main core and the second main core relative position.
As preferably, sub-core fitting portion is provided with alignment pin; Be equipped with locating slot on the fractionation face of the first main core and the second main core, and a port of locating slot is arranged on the stopper slot side; Described alignment pin matches with locating slot.Cooperate with locating slot by alignment pin, can between sub-core, the first main core and the second main core, consist of mutually spacing structure, be conducive to improve the stability of the relative position between sub-core and the first main core and the second main core.
As preferably, it is cylindric that alignment pin is, and the locating slot on the fractionation face of the described first main core and the second main core is symmetrical arranged, and locating slot is semi-cylindrical.Because the locating slot on the fractionation face of the first main core and the second main core is symmetrical arranged, can form spacing to the first main core and the second main core by an alignment pin, can reduce alignment pin quantity; Or under identical alignment pin, the raising alignment pin forms the limit strength to the first main core and the second main core, improves the stability between sub-core and the first main core and the second main core.
As preferably, the rectangular block structure of sub-core fitting portion, the stopper slot also stopper slot on the fractionation face of corresponding rectangular shape and the first main core and the second main core is symmetrical arranged; The relative two sides of described stopper slot are that the angle between inclined plane and the two sides is spent less than 21, and the side of described sub-core fitting portion is provided with the inclined-plane corresponding with the inclined plane of stopper slot.Because the relative two sides of stopper slot are the inclined plane, and the side of sub-core fitting portion also corresponding be the inclined-plane; Thereby the fitting portion of group core is when cooperating with the stopper slot of the first main core and the second main core, be conducive to eliminate the gap between sub-core fitting portion and the first main core and the second main core, improve the stability of the relative position between sub-core and the first main core and the second main core.
As preferably, the center of gravity of sub-core is positioned on its fitting portion.Because the center of gravity of sub-core is positioned on its fitting portion, after the fitting portion of main core is positioned at the first main core, the second main core and sub-core on the mould; Sub-core is difficult for perk, is conducive to keep the location status of sub-core, thereby improves the stability of sub-core and the first main core and the second main core relative position.
The beneficial effects of the utility model are:
1, is easy to realize the foundry goods of die cavity internal structure complexity;
2, the core location is reliable, stable, and casting section thickness is even, but Effective Raise cast product qualification rate;
3, solid position can be do not occurred after the foundry goods moulding, the cost of raw material and the processing cost of product can be reduced; To lack amount of machining simultaneously, enhance productivity.
Description of drawings
Fig. 1 is a kind of explosive view of coated sand core positioning structure of the present utility model.
Fig. 2 is a kind of part section structural representation of coated sand core positioning structure of the present utility model.
Fig. 3 is a kind of partial structurtes schematic diagram of existing foundry goods.
Fig. 4 is a kind of partial structurtes schematic diagram of core corresponding to Fig. 3 medium casting die cavity.
Fig. 5 is a kind of explosive view of main core corresponding to Fig. 3 medium casting die cavity and sub-core.
Among the figure: main core 1, sub-core 2, the first main core 3, the second main core 4, formed product section 5, fitting portion 6, fractionation face 7, stopper slot 8, locating slot 9, alignment pin 10, foundry goods 17, primary cavity 18, embedded die cavity 19, jack 20.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment the utility model is described in further detail:
As shown in Figure 1 and Figure 2, a kind of coated sand core positioning structure comprises main core 1 and sub-core 2, all has formed product section 5 and fitting portion 6 on main core and the sub-core.The center of gravity of sub-core 2 is positioned on its fitting portion 6.Main core 1 is made of the first main core 3 and the second main core 4, and all has formed product section and fitting portion on the first main core and the second main core; Be specifically, the first main core and the second main core are split by main core and form, and split on the first main core of forming and the second main core and all have formed product section and fitting portion.Have on the first main core 3 and the second main core 4 and have fractionation face on fractionation face 7 and the first main core and the second main core and fit.Fractionation face 7 can parallel or overlap with mold parting surface or intersect.The fractionation face 7 of the first main core and the second main core is provided with the stopper slot 8 for accommodating sub-core fitting portion 6.Stopper slot 8 is by the past formed product section extension of the fitting portion of main core and run through fractionation face 7.Stopper slot on the fractionation face of stopper slot 8 rectangular shapes and the first main core and the second main core is symmetrical arranged.The relative two sides of stopper slot 8 are that the angle between inclined plane and the two sides is spent less than 21.Sub-core fitting portion 6 rectangular block structures, and the side of sub-core fitting portion 6 is provided with the inclined-plane corresponding with the inclined plane of stopper slot 8.The fitting portion 6 of sub-core 2 is positioned in the stopper slot 8, and has at least a part to be clamped between the fitting portion of the first main core and the second main core in the sub-core fitting portion.
The fitting portion 6 of sub-core 2 is provided with two alignment pins 10, and alignment pin 10 is cylindric.Be equipped with two on the fractionation face 7 of the first main core 3 and the second main core 4 and be semi-cylindrical locating slot 9, and the locating slot 9 on the fractionation face of the first main core and the second main core is symmetrical arranged.One port of locating slot 9 is arranged on stopper slot 8 sides, and namely an end of locating slot 9 is communicated with stopper slot 8.Alignment pin 10 matches with locating slot 9, is specifically, and alignment pin 10 cooperates with corresponding a pair of symmetrically arranged locating slot 8.
The localization method of a kind of coated sand core positioning structure of the present utility model is as follows:
At first, the fitting portion 6 of sub-core 2 is snapped in the stopper slot of the first main core 3 or the second main core 48, and be clamped in the stopper slot by amalgamation the first main core 3 and the second main core 4 fitting portion 6 with sub-core 2.Have at least a part to be clamped between the fitting portion 6 of the first main core 3 and the second main core 4 in the fitting portion 6 of sub-core 2.
Then, the fitting portion 6 by main core 1 is positioned at the first main core, the second main core and sub-core on the mould.Behind the core location, the mould matched moulds; Mold clamping force by upper and lower mould is fixed on sub-core, the first main core and the second main core on the mould.
The concrete thought of a kind of coated sand core positioning structure of the present utility model is as follows: at first be that cavity structure to complexity decomposes, namely the sand core structure of complexity decomposed; Core is split into two or more fairly simple cores.Then each core is integrated.
Each core after the utility model key is how will to split, reliable and stable integrator obtains complete core.At first, main core is split as the first main core and second main core two parts; Then wrap up the fitting portion of sub-core by the first main core and the second main core after splitting, thereby obtain complete core.Because what split face is arranged so that all have formed product section and fitting portion on the first main core and the second main core, and has at least a part to be clamped between the fitting portion of the first main core and the second main core in the sub-core fitting portion; Like this behind the mould matched moulds, clamping force that can be by upper and lower mould is retained as one reliably with the fitting portion of sub-core, the first main core and the second main core, guarantees the stability of sub-core and the first main core and the second main core relative position.The more important thing is, when the first main core and the second main core amalgamation, and the fitting portion of sub-core is clamped in the process between the first main core and the second main core, friction between the fitting portion of sub-core and the first main core and the second main core is very little, can the drop phenomenon not occur and produce the gap because of friction; Thereby the fitting portion of sub-core and the quality of fit between the stopper slot are good.After main core and sub-core are positioned on the mould, and after the mold clamping force by mould is fixedly clamped main core and sub-core, sub-core can be reliable, stable be positioned between the first main core and the second main core, make the relative position between sub-core and the first main core and the second main core stable; Thereby guarantee that casting section thickness is even, but Effective Raise cast product qualification rate.
Claims (6)
1. a coated sand core positioning structure comprises main core (1) and at least one sub-core (2), all has formed product section (5) and fitting portion (6) on described main core and the sub-core; It is characterized in that, described main core is made of the first main core (3) and the second main core (4), and all has formed product section and fitting portion on the first main core and the second main core; Have fractionation face (7) on the first main core and the second main core, and the fractionation face of the first main core and the second main core fits; The fractionation face (7) of the described first main core and the second main core is provided with the stopper slot (8) for accommodating sub-core fitting portion, and the fitting portion of described sub-core is positioned in the stopper slot; Described main core is positioned on the mould by its fitting portion.
2. a kind of coated sand core positioning structure according to claim 1 is characterized in that, described stopper slot (8) is by the past formed product section extension of the fitting portion of main core and run through fractionation face (7); Have at least a part to be clamped between the fitting portion of the first main core (3) and the second main core (4) in the described sub-core fitting portion (6).
3. a kind of coated sand core positioning structure according to claim 1 and 2 is characterized in that, the fitting portion (6) of sub-core (2) is provided with alignment pin (10); Be equipped with locating slot (9) on the fractionation face of the first main core and the second main core, and a port of locating slot is arranged on stopper slot (8) side; Described alignment pin matches with locating slot.
4. a kind of coated sand core positioning structure according to claim 3 is characterized in that, described alignment pin is cylindric, and the locating slot on the fractionation face of the described first main core and the second main core is symmetrical arranged, and locating slot is semi-cylindrical.
5. a kind of coated sand core positioning structure according to claim 1 and 2, it is characterized in that, the rectangular block structure of described sub-core fitting portion (6), stopper slot (8) the also stopper slot on the fractionation face of corresponding rectangular shape and the first main core and the second main core are symmetrical arranged; The relative two sides of described stopper slot are that the angle between inclined plane and the two sides is spent less than 22, and the side of described sub-core fitting portion is provided with the inclined-plane corresponding with the inclined plane of stopper slot.
6. a kind of coated sand core positioning structure according to claim 1 and 2 is characterized in that, the center of gravity of described sub-core is positioned on its fitting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220414084 CN202741687U (en) | 2012-08-21 | 2012-08-21 | Package type sand core positioning structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220414084 CN202741687U (en) | 2012-08-21 | 2012-08-21 | Package type sand core positioning structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202741687U true CN202741687U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220414084 Expired - Fee Related CN202741687U (en) | 2012-08-21 | 2012-08-21 | Package type sand core positioning structure |
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| Country | Link |
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| CN (1) | CN202741687U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873274A (en) * | 2012-08-21 | 2013-01-16 | 宁波敏宝卫浴五金水暖洁具有限公司 | Positioning method for wrapped sand core and positioning structure for foundry sand core |
-
2012
- 2012-08-21 CN CN 201220414084 patent/CN202741687U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873274A (en) * | 2012-08-21 | 2013-01-16 | 宁波敏宝卫浴五金水暖洁具有限公司 | Positioning method for wrapped sand core and positioning structure for foundry sand core |
| CN102873274B (en) * | 2012-08-21 | 2015-05-20 | 宁波敏宝卫浴五金水暖洁具有限公司 | Positioning method for wrapped sand core and positioning structure for foundry sand core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20160821 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |